AI agents use add_tester_to_group to create or update resources in App Store Connect — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your App Store Connect environment.
This tool performs a Write operation—it creates or modifies data (adding a tester to a group) in a reversible manner. It is not destructive (removal is possible), not financial, and not execute-class code execution.
From the tool's definition Tool name 'add_tester_to_group' and description 'Add a new tester to a beta group' indicate creation/modification of membership data. The action creates a new association between a tester and a group, which is reversible (tester can be removed later).
Documented attack patterns abuse exactly the kind of access add_tester_to_group gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and App Store Connect, and nothing reaches the server without passing your rules. This is the rule we recommend for add_tester_to_group:
{
"version": "1",
"default": "deny",
"tools": {
"add_tester_to_group": {
"limits": [
{
"counter": "add_tester_to_group_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_tester_to_group stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Add a new tester to a beta group. It is categorised as a Write tool in the App Store Connect MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the App Store Connect MCP server in PolicyLayer and add a rule for add_tester_to_group: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches App Store Connect. Nothing to install.
add_tester_to_group is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the add_tester_to_group rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for add_tester_to_group. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
add_tester_to_group is provided by the App Store Connect MCP server (joshuarileydev/app-store-connect-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from App Store Connect, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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27 App Store Connect tools catalogued and risk-classified — across an index of 43,000+ MCP servers.